How to make a copy values from one column to another in sql?

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SELECT category, type, AVG(price) FROM products GROUP BY category, type ORDER BY 1, 2 If there are three distinct categories in the "products" table, and each one has five different types, how many rows are returned by the query above? 1. 1 row 2. 3 rows 3. 5 rows 4. 8 rows 5. 15 rows

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Which are the most commonly used sql joins?

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Explain the order of sql statement execution?

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Mention what is the plv (pl/vision) package offers?

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how to saw triggers output in pl/sql database?

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What does the base_object_type column shows in the user.triggers data dictionary view?

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What is primary key in db?

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How to fetch common records from two tables?

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what is “go” in t-sql? : Transact sql

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what are the advantages of sql ? : Sql dba

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Can one improve the performance of sql*loader? : aql loader

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